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DateTue, 05 Feb 2008 21:59:20 -0800
From"H. Peter Anvin" <>
SubjectRe: Access MSR functions in userspace?
Maxim Levitsky wrote:
> On Wednesday, 6 February 2008 05:29:47 Hasan Rashid wrote:
>> Is there a way to use RDMSR and WRMSR in userspace? I only need to write
>> to one register, writing a module with a userspace piece to handle that
>> seems like an over kill.
>>
>> TIA!
> 
> 
> Fortunately linux have /dev/cpu/*/msr
> Take  look at $LINUX_SOURCES/arch/x86/kernel/msr.c to learn how to use it.
> 

You might also find these useful:

http://www.kernel.org/pub/linux/utils/cpu/msr-tools/msr-tools-1.1.2.tar.bz2

	-hpa


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